                    // 获取
                    let mdd = document.querySelector("#head .nav-right ul li:nth-child(2) a");
                    let mdd1 = document.getElementById("lings");
                    let mdd2 = document.querySelector("#head .nav-right ul li:nth-child(6)");
                    let mdd3 = document.querySelector("#head .nav-right ul li:nth-child(7)");
                    let mddeu = document.querySelector("#head .nav-right ul li:nth-child(2) ul");
                    let mddeu1 = document.querySelector("#head .nav-right ul li:nth-child(3) ul");
                    let mddeu2 = document.querySelector("#head .nav-right ul li:nth-child(6) ul");
                    let mddeu3 = document.querySelector("#head .nav-right ul li:nth-child(7) ul");
                    // console.log(mdd,);
                    
                    // 添加事件
                    mdd.addEventListener("mouseenter", function () {
                        // alert("22")
                        mddeu.classList.toggle("unactive")
                    })
                    mdd1.addEventListener("mouseenter", function () {
                        // alert("22");
                        mddeu1.classList.toggle("unactive")
                    })
                    mdd2.addEventListener("mouseenter", function () {
                        // alert("22");
                        mddeu2.classList.toggle("unactive")
                    })
                    mdd3.addEventListener("mouseenter", function () {
                        // alert("22");
                        mddeu3.classList.toggle("unactive")
                    })

                    let mb1=document.querySelector("#head .nav .nav-left");
                    let mbeu1=document.querySelector("#head .nav .nav-left ul");
                    console.log(mb1,mbeu1);
                    console.log(mdd3, mddeu3);                    
                    mb1.addEventListener("mouseenter",function(){
                        // alert("22")
                        mbeu1.style.display="block";
                    })
                    mbeu1.addEventListener("mouseleave",function(){
                        // alert("22")
                        mbeu1.style.display="none";
                    })

                    